Device for preventing doors from sagging.



P. E. NORDQVIST. DEVIUB FOR PREVENTING DOORS FROM SAGGING.

APPLICATION FILED JULY 2, 1908.

Patented Apr. 19,1910.

2 sums-SHEET 1.

' HHMIR 1mm I WHY names ANDREW n GRAHAM on. PHGTO-LITMOGRAPHERSWASHINGTON. ma

P B. NORDQVIST. DEVIGE FOR PREVENTING DOORS FROM SAGGING.

APPLICATION FILED JULY 2, 1906.

955,674. Patented Apr. 19, 1910.

2 SHEBTS-SHEET 2.

ANDREW B GPJMAM CDJFHOTO-UTHOGRAFHER$ WASHKNGTON, ma

' ITE SATE PA PER ERIK NORDQVIST, 0F SUNDBYBERG, SWEDEN, ASSIGNOR, BYDIRECT AND MESNE ASSIGNMENTS, TO CONCEALED DOOR CHECK COMPANY, ACORPORATION OF NEVADA.

DEVICE FOR PREVENTING DOORS FROM SAGGING.

To all whom it may concern:

Be it known that I, PER ERIK Nonoov s'r, a subject of the King ofSweden, residing at Sundbyberg, Sweden, have invented certain new anduseful Improvements in a De vice for Preventing Doors from Sagging; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. I

My invention relates to devices for preventing doors, gates and otherhinged closures from sagging, and the object of my invention is toproduce such a device that will hold swinging doors firmly at a deadcenter; one that will be simple and efficient in action, cheap toconstruct; and one that is not liable to get out of order, althoughsimple and cheap forms of hinges may be employed.

A further object of my invention is to provide a concealed device of theabove na ture that will be especially adapted for use in connection witha concealed door check such as that disclosed in my former Patent N 0.683,972, dated October 8, 1901.

lVith these objects in view my invention consists in the details ofconstruction and novel combinations of parts more fully hereinafterdisclosed, and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of thisspecification, in which like numerals refer to like parts in all theviews :Figure 1, is a detail elevational view of a frame, and a doorlocated therein, showing my supporting cam and roller.

Fig. 2, is a detail sectional view showing my cam and roller on anenlarged scale. Fig.

3, is an elevational view showing the frame with the door fully opened,the hinges connecting the same, and a rear view of my cam. Fig. 4, is aplan view showing my cam in various positions, and Fig. 5, is aperspective view of my supporting cam and roller.

1, indicates any suitable support, in this instance shown as the frameof a door; 2, any suitable closure, in this instance a door; and 3, anysuitable hinges bet-ween said support and frame. I cut away the top ofthe Specification of Letters Patent.

Application filed July 2, 1908.

Patented Apr. 19, 1910. Serial No. 441,607.

door 2, as shown at 4, or I may provide a strip 5 on the top of thedoor, in order to form the cut away portion 4. In the space formed bythis cut away portion 4, I locate the cam 5 and the roller 6. The cam 5is preferably supported upon the casting 7 rigidly attached to the door,and is otherwise suitably fastened to the top edge of the door bysuitable fastenings, as shown, passing through the holes 8, so as tofirmly secure said cam and door together. This cam is of a suitableheart shape, provided with suitable curved faces 9 and the basecontacting surfaces 10, as shown.

The roller 6 is mounted upon the pin 11, preferably rigidly secured tothe casing above the door; but of course the position of the cam androller may be reversed. That is to say, the cam may be suitably securedto the casing above the door, and the roller secured to the door, orother closure, if such construction be desired.

The hinges 3, securing the door to the easing, are preferably providedwith three leaves, and are preferably secured to each side of saidcasing and door, as shown. That is to say, said hinges are preferablyeach provided with the leaves 12, 13 and 14, joined by the pintles 15and 16. The leaves 12 being secured to the door; the leaves 14 beingsecured to the casing; and the leaves 13 being loose and adapted to liebetween the door and casing, when the door is closed. The pintles 15 aremovable with the door, while the pintles 16, lying on each side of thecasing, are stationary, all as is well known in this style of hinge.l/Vhen the door is closed, as shown in Fig. 4, the pintles 15 and 16 arein a straight line, and con stitute centers from which the curves 9 ofthe heart shaped cam 5 are struck.

18, Fig. 1, represents a concealed door check, preferably of the formillustrated in my former patent above referred to, and 19 a linkconnecting the piston rod of said check with the lug 20 secured to thedoor jamb.

21 represents a plate secured to the frame or other support for myclosure, and against which the contacting surfaces 10, of the heartshaped cam 5, take when the door or other closure is in its closedposition. This plate 21 is preferably secured to the casting 22, securedto the frame of the door as shown, but it may be integral therewith, oreven integral with the plate 23 above the door which accommodates thepin 11 carrying the supporting roller 6.

It is well known that doors and other closures, and especially when theyare heavy, will always sag unless the hinges which support the same areof a solid and costly nature. This is especially true in doors providedwith door checks, which cause pulls and jerks upon the said hinges andthereby cause the same to deteriorate much faster than would otherwisebe the case.

One of the main features of my invention, as above stated, consists inrelieving this strain upon the hinges, especially when door checks areused, and at the same time of partially supporting the door at all timesby a means entirely independent of the hinges. That is to say, thecontacting surfaces between my heart shaped cam 5 and rollers G, as bestillustrated in Figs. 1 and i serve to effectually prevent any sagging ofthe door or other closure whatever, and as the surfaces 9 of the saidcam substantially roll in contact with the roller 6, as the door swingsupon its hinges, the said cam and roller in eflect constitute a sort ofhinging means for the door, which not only takes a certain amount ofstrain off of the regular hinges, butalso receives and absorbs all ofthe additional strain that might be placed upon the door in a direct-ionwhich would tend to make it sag. That is to say, it will be observedthat my supporting heart shaped cam 5 and roller 6, not only permit thecheapest and lightest forms of hinges to be used on doors withoutsagging, but they also serve to take up the strains and shocks that areimparted to said hinges when door checks provided with strong springsare used.

It results directly from this structure that I may employ the mostpowerful door checks upon doors provided with cheap hinges, and yet atthe same time always secure a perfectly even and smooth working of thedoor when being closed by the door check. In addition to this, byproviding the base contacting surfaces 10 on the cam, which take againstcorresponding surfaces on the plate 21, or frame as the case may be, Iam enabled to check the door completely at the moment of its closure,and without having it pass beyond the closing point, although the doormay be of the style which opens with the same facility in eitherdirection. In fact the liquid door check disclosed in my former patentabove, is provided with an adjustable regulator by which I may cause thedoor to close violently or slowly, or in any other manner desired, andwhen a door provided with this said check is also provided with mysupporting cam. and roller, the said door is caused to close smoothlyand notto pass beyond the closing position, no matter how quickly mycheck may bring the door to said position. It will thus be seen that bythe simple expedient of providing an inexpensive supporting cam androller to absorb the shocks of a door check, and to take the strains otfof the hinges, I am enabled to produce adoor provided with acomparatively inexpensive equipment, which will work as smoothly and assatisfactorily under all conditions as a far more expensively equippeddoor. And, furthermore, by so locating the said roller, cam and check asto conceal them from view, the said door is given the same handsomeappearance as highly expensive doors.

I do not wish to be understood as limiting myself to the exact detailsof construction and operation of parts above set forth, for it isevident that the same may be varied by those skilled in the art withoutdepart ing from the spirit of my invention.

\Vhat I claim is 1-- 1. In hinged closures employing a device forpreventing sagging, the combination of a suitable support; a suitableclosure; a hinge secured to said support and closure; a supportingroller; and a cam adapted to contact with said roller; one of said lastmentioned parts carried by said support, the other carried by saidclosure the two being fixed to their respective supports and adapted toreceive a portion of the weight of said closure when swinging on itshinge and thereby to prevent sagging, substantially as described.

2. In hinged closures employing a device for preventing sagging, thecombination of a suitable support; a suitable closure; hinges secured tosaid support and closure and having their pintles at each of the sidesof the same; a supporting roller; and a heart shaped cam having saidpintles as the centers of curvature adapted to contact with said rollerand together with the latter to take the weight of said closure off saidhinges and thereby prevent sagging, substantially as described.

3. In a hinged closure employing a device for preventing sagging, thecombination of a suitable frame on each side of which said closure ishinged; a roller carried by said frame; and a heart shaped cam struckfrom the pivoted points of said hinges carried by said closure, adaptedto contact with said roller, and provided with a base portion adapted tocontact with said frame, substantially as described.

at. In doors employing a device preventing the same from sagging, thecombination of a door frame; a door; hinges between said door and saidframe turning on centers 1oadapted to contact with said frame when thecated at each side of said frame; a roller cardoor is closed,substantially as described. 10 ried by said frame above the top of saidIn testimony whereof, I have affixed my door; and a heart shaped camstruck from signature, in presence of two witnesses.

said centers, and adapted to contact with PER ERIK NORDQVIST. saidroller and to take a portion of the WVitnesses: weight off of saidhinges as the door swings; JAMES J. HUBEL,

and said cam also provided with a base HARRY W. T. Ross.

